Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-05-15
Astrophys.J. 594 (2003) 443-448
Astronomy and Astrophysics
Astrophysics
6 pages AAS-Latex, uses emulatapj.sty, 3 figures, accepted for publication in ApJ
Scientific paper
10.1086/376902
Brief HST/STIS spectroscopic snapshot exposures of the cataclysmic variables 1RXSJ232953.9+062814, CE315, BZ UMa and EY Cyg reveal very large NV/CIV line flux ratios, similar to those observed in AE Aqr. Such anomalous line flux ratios have so far been observed in 10 systems, and presumably reflect a different composition of the accreted material compared to the majority of cataclysmic variables. We discuss the properties of this small sample in the context of the recent proposal by Schenker et al. (2002) that a significant fraction of the present-day population of cataclysmic variables may have passed through a phase of thermal time-scale mass transfer.
Beuermann Klaus
de Martino Domitilla
Gänsicke Boris T.
Hubeny Ivan
Knigge Christian
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